Razor stropping means



Dec. l0, 1929. P. MLLER 1,739,167

RAZOR STROPPING MEANS Filed June 14, 1927 2 Fig. 2. 6l

Patented Dec. 10, 1929 UNITE STATES PATENT OFFICE PAUL MLLER, F SOLINGEN, GERMANY RAZOR stritorriive iirEANs Application led .Tune 14, 1927, Serial No. 198,821, and in Germany May 9, 1327.

This invention refers broadly to improvements in stropping means for razors, surgical knives, corn-blades and the like, and it is particularly adaptable for the stropping and sharpening of knives with reinforced baclr and but one cutting edge, though it is not restricted to this use and in its broad features may find employment in connection with other kinds of razors or the like, such as razors of the plate-shaped or wafer-shaped type, and it is one of the important objects of the invention to greatly facilitate and accelerate the stropping operation, to save the delicate sharp edge from injury, and to l5 simplify the construction of devices of the class referred to. In view of these and other important objects and advantages means are provided according to this invention to detachably mount the razor blade or the like to be treated in a spring actuated holder, rotatably mounted in a carriage, adapted to be axially reciprocated in parallelism to the stropping surface by gear-an'd-rack connection or by similar means, and alternatingly rocked in opposite directions in accordance with the reciprocation of the carriage, so that diderent sides of the blade will become operatively engaged with the stropping surface. In accordance with! one particular form of preferred embodiment of the invention the means for the reversing of the shaft of the blade holder mainly comprises a rack bar in the longitudinal direction of the carriage guide, and engaging with a pinion or gear wheel mounted on the carriage and upon the shaft of the blade holder. The coupling of the blade holder with this driving and reversing shaft is preferably effected bv a strong spring-actuating split collar. The stropping surface or the like is preferably provided on a suitable resilient insertion piece supported between the carriage guides and preferably adapted to be used on both sides.

Among the various advantages of the new device the following may be mentioned in particular. In view of the reversible feed ing and operating action being produced by gear wheel action great exactness and reliability of operation is insured, and the blades to be stropped or honed are caused t-o properly and most uniformly engage the stropping surface which is thereby likewise protected from being cut, and

a most simple, easy and reliable manipulation of the entire device is produced. In view the novel construction great thereof and by means of durability of the apparatus is insured without danger of interruptions during operation even with frequent and heavy usage.

The invention will be more fully described by reference to the accompanying drawing showing by way t-he various possible of eXempliflcat-ion two of embodiments of the principles 'of the invention.

In the drawing :-Figure 1 is' a top plan view of the total arrangement of the device-- Figure 2 is a side elevation with parts in section--Figure 3 is a transverse section on the line A-B of Figure l, and Figure 4 is a transverse section on the line C-D of Figure l. shown representing In Figure 5 a modification is a two-sides stropping desuitable material. With the rack bar 4 which guide rods a pinion or which is rotatably 2 and which during the carriage 2 is adapted constitutes one of the gear Wheel 6 is engaged disposed on the carriage the reciprocation of to rotate a gear wheel 8 on the transverse shaft 7 in one or t to rotate said shaft 7 in direction. Upon th he other direction, so as the corresponding is shaft 7 disposed at the front portion of the carriage the holder 9 for the spring-acting ing of the blade to mounted, and is f coupled to the shaft preferably formed springs. coupling and of the the blade holder 9 interchangeable mountbe treated is rotatably or instance, frictionally 7 by means of a collar l2 from suitably bent flat By the action of this frictional gearing elements 4, 6, 8, 7 is turned into the opposite stropping or grinding position upon reversing the directi on of movement of the carriage 2, while upon continuing to move the carriage in either of these directions the blade is closely forced against the stropping surface 13 without any liability of injuring the cutting edge thereof.

In accordance with the modification shownl in Figures 1 to 4 this stropping surface is provided on one side of a readily removable tensioning support 14 mounted in the supporting frame 5 and on the other side of which an additional and preferably differently arranged stropping surface 15 may be secured, inprder to allow for instance of a preleminary and supplemental sharpening of the blades to be treated by merely reversing the tensional 14 in the frame 5. v

In the modification according to Figure 5 which provides for the employment of both sides of the device according to this inven' tion, the guide rod 4 for the double-carriage 2 may be toothed on the upper and lower sides, and by the operation of the handle 1 the blades 10 are stropped or honed by'being moved along the treating surfaces 13 and 15 respectively of the inserted support 14, holding and coupling means being provided upon the upper and lower sides of the stropping means 13, 15 with corresponding coupling means and gear wheels by means of which the blades and 'their holders are reversed upOn the corresponding reciprocation of the carriage.

The carriage movement is limited in its terminal positions on the frame 5 by suitable means, such as for instance by impinging against the front walls of the frame or by other stropping means. While the arrangement shown by way of exemplication on the accompanying drawing has been found useful for carrying out the objects of my invention, it should be understood that other modifications are possible, and I therefore do not desire to be limited in the scope of my protec'tion except as outlined in the appended claim.

I claim A stropping and blade-treating device, comprising7 in combination, a longitudinal frame and two longitudinal guide rods, of which one is designed as a rack; sleeves adapted to be shifted along said rods and a grip forming frame connected with said sleeves; a transverse shaft supported by said latter frame just over the said sleeves, a pinion affixed to one end of said shaft, and a transmission cog-wheel carried by said gripforming frame and meshing with said rack, as well as with said pinion; a blade-holder attached to thesaid shaft and comprising a sleeve enclosing this shaft, and two ledges projecting forth from these sleeves and adapted to receive a blade between them; and a stropping member located in said frame between the said rods.

PAUL MULLER. 

